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1·The sum was paid ex gratia.

这是所付的一笔特惠款。《牛津词典》

2·Another situation is linked to price High, said, ex gratia is not ex-gratia.

还有一种情况是挂价虚高，说“特惠”实不“特惠”。

3·An ex-gratia payment will only be made where we are satisfied that the original decision was wrong and a review application was unnecessary.

如果原始的决定是错的，同时复查申请是没有必要的地方才要求增加付费。

(1)ex gratia（拉）作为优惠的；[商]通融的